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	POLYACETYLENE FILM FORMED BY ELECTROCHEMICAL TECHNIQUE
	Huang, M. H. ; Ye, M. K. ; Tian, Z. W. ; Tian ZW(田昭武)
	1985
英文摘要	The suitably doped polyacetylene film can be used for the conversion of sunlight energy into electrical or chemical energy. A new electrochemical technique was introduced for obtaining polyacetylene film by cathodic initiation of the polymerization process. The advantage of this technique is that the polymerization process can be controlled by the wave form of electrode current and the composition of the solution. Polyacetylene films of different properties and thickness can be conveniently prepared in this way. The catalyst was dissolved in certain organic solvent and introduced into the electrolytic cell. The solution was then cooled flown la low temperature and saturated with acetylene gas before cathodic polymerization. Several transition metals and other electric conducting materials have been used as electrodes. On passing suitable current, red color appeared at the cathode/solution interface and the polyacetylene; film formed gradually. The solvent used may influence the film growing kinetics in the electrochemically initiated polymerization. It must show adequate dielectric constant and be inert toward the ends of the growing chains. Among many solvents studied, DMF is the appropriate one. The influences of electrolysis conditions are remarkable and interesting. The polyacetylene film cannot be formed when the current density is smaller than a critical value. The chain growth may be effectively stopped by reversing the cathodic current to anodic current. This phenomenon provides not only information for the anionic polymerization mechanism but also an effective way to control the chain growth and the properties of the polymer film formed. By passing cathodic/anodic alternative pulses through the electrode, some codeposited impurities can be removed and the length of chain controlled. The effect of electrode materials on the rate of film growing has been studied. Rapid polymerization and thick fain can be obtained for Ni and Cu electrodes. After the electrochemically initiated polymerization process, the polyacetylene film was washed with hydrochloric acid and dried. A silvery and coherent film may be obtained if the film is thick enough. The polyacetylene film was characterized using Raman scattering technique(Fig. 1) and scanning electron microscope (Fig.2). The morphology of the film depends strongly on the wave form of electrode current. The photovoltaic effect of the polyacetylene film has been measured and detailed studies are under way.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/63053]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Huang, M. H.,Ye, M. K.,Tian, Z. W.,et al. POLYACETYLENE FILM FORMED BY ELECTROCHEMICAL TECHNIQUE[J],1985.
APA	Huang, M. H.,Ye, M. K.,Tian, Z. W.,&田昭武.(1985).POLYACETYLENE FILM FORMED BY ELECTROCHEMICAL TECHNIQUE..
MLA	Huang, M. H.,et al."POLYACETYLENE FILM FORMED BY ELECTROCHEMICAL TECHNIQUE".(1985).

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